Feeding mechanism for sewing-machines



(No Model.) 2 Sheets-Sheet 1.

C. H. WOOD.

FEBDING MBGHANISM POR SEWING MACHINES.

No. 2652,568.A Patented Jan.l'7,18812.

N. Firms, mmxo-Lvmngmpner, wmmgm". n cA 2 ShBBS-Sheet 24 (No Model.)

O. H. WOOD.

v1-1EED1EG- MEGEANISM EOE SEWING MACHINES Patented Jan. 17,18 82.

M75-fuenf@ N. PETERS Phom-ulhngnpher, wuhingmn, D4 C.

" NITED rares ATENT @ri-*rcito FEEDING MECHANISIVI FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 252,568, dated January17, 1882.

A Application filed November 14, i881. (No model.)

To all whom t't may concern:

Be it known that I, CHARLES II. Woon, of Springfield, in the county ofHampden and State of Massachusetts, have invented a new and usefulImprovement in Sewing-Machine Feed Mechanism, of which the following isa description and specification. v

The object of my invention is to cause all the movements of the feed tobe made positive and without the aid of springs or any elastic force. I.accomplish this by the mechanism substantially hereinafter set forth andillustrated in socket an arm, as 8, of a link, as 7,hasits beartheaccompanying drawings, in which- Figure I is a reverse plan view of somuch of a sewing-machine bed as is necessary to show my improvedmechanism as applied thereto. Fig. 1I is a transverse section of thesame at line O of Fig. I. Fig. III is a side view ot' the feed-bar andfeed, with a transverse section of the feed-lever, showing itsengagement with the feed-bar. Fig. IV is a reverse plan view or edgeview of a portion of the feed-bar, showing a modification of themechanism for taking up the lost motion of the feed-bar. Fig. V is anend, side, and top view of a vertical wedge fortaking up thelostmotionof the feedbar. Fig. VI is a section through the bed of the machine atline D, showing the feed-operati-ng mechanism, and also the mechanismfor taking up lost motion of the feed-bar. Fig. VII is a longitudinalsection of a portion of the feed-lever and the bed ofthe machine.showing a lmodification of the link by which the feed-lever is hung tothe bed of the machine, and which gives the feed-lever its verticalmovement; and Fig. VIII is a reverse plan view, showing the cam attachedto the vertical shaft which actuates the feed-lever, and theconnectionof the latter therewith. Fig. IX isa reverse plan view of thebed of the machine, showing in full and in dottedl lines thefeed-operating lever and the link which secures it to the bed of themachine in the extreme horizontal positions which they will occupy whenin operation. Fig. X isa vertical longitudinal section at line E ofFig'. IX, showing in full and in dotted lines the eX- treme verticalpositions ot' the feed-lever and link when in operation.

In the drawings, A represents the bed of a sewing-machine, to which anordinary pivoted feed-bar, as 4, is attached, carrying the feed, as 15,and with which feed-bar an ordinary feedlever, as 2, engages in arecess, as 5, made therefor, the feed-lever having a bearing on bothyitsedges in the feed-bar, and also for a short distance from one edge onboth its sides; or the feed-lever may engage with .the feed-bar in anyother convenient manner, so that both shall move freely, and yet withlittle or no lost motion between them.

A socket, as 9, is secured in the feed-lever, preferably near the end ofthe latter, in which ing in such manner that the/ socket is free toslide to and fro along the arm, and this link, as 7, is suitably pivotedto the lower side of the bed ot' the machine, preferably by a pin orscrew inserted through the upper end of the link into a lug, as 1, caston the lower side, of the bed, as shown clearly in Fig. II.

To provide for taking up any lost motion of the feed-bar occasioned bywear of the parts or otherwise, I cast two lugs, as IO-and 11, on thelower side of the bed, the lug, as 11, having one plane vertical side,against which the side ot' the feed-bnr may bear, and the inside of thelug, as 10, is made inclined-relatively to the adjacent vertical sideofthe lug, as 11, as shown clearly in Fig. VI, and a wedge-piece, as 12,is made to tit the space between the inclined side of the lug, as 10,and the vertical side of the feed-bar 4, which extends between thiswedge, as l2, and the lug, as Il. In orider that this wedge may alwaysretain its proper vertical position, I provide a vertical elongatedprojection or boss, as 14, on the side ofthe wedge, which just entersand engages with a verticalslot in the lug, as 10, so that a screwextending through this slot and turned into a threaded hole in the wedgemay serve to vadjust the wedgeinto afirmbeariug against the feed-bar, as4, and cause the latter to move always in the same plane. Instead ot'adjusting this wedge ina vertical direction, as shown in Figs. I, II,and VI, I may adjust it horizontally by making one side ofthe feed-baron an incline relatively with the adjacent side ot' the lug, as 10, madevertical, and the wedge adapted to slide lengthwise along thefeed-bar,and be secured thereto by the screw, as 16, turned through a horizontalslot in the wedge intov a ICO threaded hole in the feed-bar, as shownclearly in Fig. IV.

Fig. VII shows a modification of the link which secures the feed-leverto the bed of the machine, in Which the link, as 7, is provided with-twospherical or partially spherical ends, the lower one having a bearing inthe socket, as 9, attached to the feedlevcr, as 2, and the upper endhaving a bearing in a recess in the lug, as 1., cast on the bed, andheld in its socket securely by a cap, as a.

The operation of the feed-lever is substantially the same in both cases,as it is thereby pivoted to the bed of the machine, and when itis movedlongitudinally yin one direction by the action of the cam, as 32,0[1 thevertical shaft, as 31, the link draws the feed-lever upward in the arcof a circle of which the center of its pivot in the lug, as 1, is thecenter, and the feed-bar and feed are thereby raised, and when thefeed-lever is moved longitudinally in the opposite direction the baris'forced down in the same arc, and the feed-bar and feed are also moveddown with it.

The horizontal movement of the feed-bar and feed in both directionsisgiven bythe side movements of the feed-lever upon its saddlepivot, as 3,one of these movements being given when the feed is up, and after thelever has moved longitudinally in one direction, and the other beinggiven after thelever has moved longitudinally in the opposite direction,and when the feed is down. In this manner four separate and positivemovements of the feed bar (whlch'is adapted to move longitudinally onits pivot) are obtained to operate the feed, obviating entirely the useof springs. The feed-lever and feed-bar always move vertically to thesame extent, but the horizontal movement of both with the feed iscontrolled or limited by the feed-lever saddle-pivot, as 3, which isattached to the ordinary stitch-regir lating bar, as 30, which, with thepivot, is made movable to and fro along the feed-lever to cou trol theside movement of the feed-lever.

It is evident that the elongated boss, as 14, on the side of the wedge12 is not an essential feature, inasmuch as the wedge is perfectlyoperative without it, a little more trouble only being required toadjust it,its use being a matter ofconvenience rather than of necessity.

Having thus described my invention, what I claim as new is Thecombination, in a sewing-machine, of a feed-lever actuated by a cam andadapted t0 have a longitudinal and a lateral movement, a link pivoted atone end t0 the bed of the machine and at the other to said feed-lever,and a feed-bar carrying the feed and movably `jointed to said lever,whereby, by the combined longitudinal and lateral movements ofthefeedlever and the movement of the said link pivoted thereto, the feed isforced to make all its movements both vertically and horizontally,substantially as described.

CHARLES H. WOOD.

Witnesses:

T. A. CURTIS, l C. S. HURLBU'I.

